Afghanistan Slows Huge Cash Exodus

KABUL—The Afghan central bank's efforts to curb the exodus of money abroad are bearing fruit, with recent currency auctions showing a sharp fall in demand for U.S. cash, the bank's governor told The Wall Street Journal.

The money flow—part of it suspected by U.S. and Afghan officials to be stolen foreign aid and proceeds from the drug trade—undermines the country's economy just as foreign forces depart. The cash flight also raises...